CN106167398A - 蜂窝陶瓷蓄热体及其制备方法 - Google Patents
蜂窝陶瓷蓄热体及其制备方法 Download PDFInfo
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- 239000000919 ceramic Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 41
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 23
- 239000010431 corundum Substances 0.000 claims abstract description 23
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 21
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 21
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 21
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000000463 material Substances 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005338 heat storage Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 230000003068 static effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 235000011962 puddings Nutrition 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 abstract description 7
- 241000264877 Hippospongia communis Species 0.000 description 25
- 239000000395 magnesium oxide Substances 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000006253 efflorescence Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007500 overflow downdraw method Methods 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 206010037844 rash Diseases 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
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Abstract
本发明提供一种蜂窝陶瓷蓄热体，由72%~78%质量百分含量的刚玉粉末、17%~23%质量百分含量的碳化硅粉末和2%~8%质量百分含量的高岭土粉末制备而成。本发明还提供一种蜂窝陶瓷蓄热体的制备方法。上述蜂窝陶瓷蓄热体，由刚玉粉末、碳化硅粉末和高岭土粉末制备而成，综合了刚玉和碳化硅两种材料的特点，制备出的蜂窝陶瓷蓄热体导热系数大、耐高温且高温强度好。
Description
技术领域
本发明涉及蓄热体，特别是涉及蜂窝陶瓷蓄热体及其制备方法。
背景技术
传统的蓄热式空气预热器所采用的蓄热体陶瓷材料有陶瓷球、陶瓷砖、蜂窝陶瓷、浇注料等。陶瓷作为耐火材料，都存在蓄热体导热系数小、重量大的特点。由于在预热器中使用量大，致使设备笨重、体型庞大，且有些蓄热体材料高温强度低，在温度交变的情况下，容易开裂粉化，严重影响预热器的使用寿命，增加检修和维护成本。
因此，寻找一种导热系数大、耐高温、高温强度好的蓄热材料成为人们研究的热点。
发明内容
基于此，有必要针对背景技术中存在的问题，提供一种导热系数大、耐高温、高温强度好的蜂窝陶瓷蓄热体。
本发明还提供一种蜂窝陶瓷蓄热体的制备方法。
一种蜂窝陶瓷蓄热体，以质量百分含量计，由以下原料制备而成：
刚玉粉末 72%~78%；
碳化硅粉末 17%~23%；及
高岭土粉末 2%~8%。
在其中一个实施例中，以质量百分含量计，所述蜂窝陶瓷蓄热体由以下原料制备而成：
刚玉粉末 75%；
碳化硅粉末 20%；及
高岭土粉末 5%。
一种蜂窝陶瓷蓄热体的制备方法，包括以下步骤：
获得刚玉粉末、碳化硅粉末和高岭土粉末；
以质量百分含量计，将72%~78%的所述刚玉粉末、17%~23%的所述碳化硅粉末和2%~8%的所述高岭土粉末混合、搅拌均匀后静止均化，得到混合料；
将所述混合料与水混合，搅拌均匀后加入模具，采用振动捣实成型，脱模得到胚体。
将所述胚体风干、烘干、烧结、冷却后得到所述蜂窝陶瓷蓄热体。
在其中一个实施例中，所述刚玉粉末的粒径为5μm~10μm，所述碳化硅粉末的粒径为5μm~10μm，所述高岭土粉末的粒径为5μm~10μm。
在其中一个实施例中，所述烘干的温度为200℃~260℃。
在其中一个实施例中，所述烧结的温度为1480℃~1540℃。
上述蜂窝陶瓷蓄热体，由刚玉粉末、碳化硅粉末和高岭土粉末制备而成，综合了刚玉和碳化硅两种材料的特点，制备出的蜂窝陶瓷蓄热体导热系数大、耐高温且高温强度好。
具体实施方式
为使本发明的上述目的、特征和优点能够更加明显易懂，下面对本发明的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本发明。但是本发明能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似改进，因此本发明不受下面公开的具体实施的限制。
一种蜂窝陶瓷蓄热体，由72%~78%质量百分含量的刚玉粉末、17%~23%质量百分含量的碳化硅粉末和2%~8%质量百分含量的高岭土粉末制备而成。
优选的，该蜂窝陶瓷蓄热体，由75%质量百分含量的刚玉粉末、20%质量百分含量的碳化硅粉末和5%质量百分含量的高岭土粉末制备而成。
上述蜂窝陶瓷蓄热体中含有70%~75%质量百分含量的三氧化二铝（Al2O3）、10%~13%质量百分含量的二氧化硅（SiO2）、18%~20%质量百分含量的碳化硅（SiC）、1.0%质量百分含量以下的三氧化二铁（Fe2O3）、0.5%质量百分含量以下的氧化镁（MgO）和5%质量百分含量的其他组分（钠、钛、钾、钙）。
上述蜂窝陶瓷蓄热体的性能参数如下：
密度：2.0 g/cm3~3.3g/cm3，热膨胀系数（20℃~1200℃）：-5.9×10-6m/℃，比热容：1200J/(kg·K)，导热系数（1300℃）：5~9.7W/（m·K），耐火度：1450℃。
刚玉具有强度高、耐高温、蓄热能力大的特点，碳化硅导热性能良好、耐高温，由刚玉粉末、碳化硅粉末和高岭土粉末制备而成的蜂窝陶瓷蓄热体综合了刚玉和碳化硅两种材料的特点，导热系数大、耐高温、高温强度好。
一种蜂窝陶瓷蓄热体的制备方法，包括以下步骤：
S110、获得刚玉粉末、碳化硅粉末和高岭土粉末。
其中，刚玉粉末的粒径为5μm~10μm，碳化硅粉末的粒径为5μm~10μm，高岭土粉末的粒径为5μm~10μm。
S120、以质量百分含量计，将72%~78%的刚玉粉末、17%~23%的碳化硅粉末和2%~8%的高岭土粉末混合、搅拌均匀后静止均化，得到混合料。
优选的，将75%质量百分含量的刚玉粉末、20%质量百分含量的碳化硅粉末和5%质量百分含量的高岭土粉末混合、搅拌均匀后静止均化，得到混合料。
碳化硅粉末以一定比例掺入刚玉粉末中，为了使其铸胚成型及烧结顺利，在其中加入一定比例的高岭土。
S130、将上述混合料与水混合，搅拌均匀后加入模具，采用振动捣实成型，脱模得到胚体。
具体的，将上述混合料与水混合后，搅拌均匀后加入模具，采用加压振动的方法在铸模中捣实成型，脱模得到胚体。
S140、将上述胚体风干、烘干、烧结、冷却后得到蜂窝陶瓷蓄热体。
其中，烘干的温度为200℃~260℃。烧结的温度为1480℃~1540℃。
具体的，将上述胚体自然风干、在200℃~260℃烘干后，再采用电热融合方法，升温至1480℃~1540℃进行烧结，随炉冷却后得到蜂窝陶瓷蓄热体。
制备出的蜂窝陶瓷蓄热体中含有70%~75%质量百分含量的Al2O3、10%~13%质量百分含量的SiO2、18%~20%质量百分含量的SiC、1.0%质量百分含量以下的Fe2O3、0.5%质量百分含量以下的MgO和5%质量百分含量的其他组分（Na、Ti、K、Ca）。
上述蜂窝陶瓷蓄热体的性能参数如下：
密度：2.0 g/cm3~3.3g/cm3，热膨胀系数（20℃~1200℃）：-5.9×10-6m/℃，比热容：1200J/(kg·K)，导热系数（1300℃）：5~9.7W/（m·K），耐火度：1450℃。
上述蜂窝陶瓷蓄热体的规格如下：
规格：长100mm×宽200mm×高100mm，容重：0.9 g/cm3~1.31g/cm3，开孔率：40%~55%，孔径：圆孔φ4~φ8；正六边形孔对边距离：4~6mm，孔间壁厚度：1 mm ~2.2mm，抗压强度：≥18MPa，比表面积：240 m2/m3~380m2/m3。
可以理解，蜂窝陶瓷蓄热体的外形结构由模具确定，在升温、烧结时温度需要控制精准，以保证烧成的蜂窝陶瓷蓄热体收缩最小，随炉冷却时温度下降不宜过快，以防烧结后温差应力释放不均产生裂纹。
上述蜂窝陶瓷蓄热体强度高、导热性好、蓄热能力大、耐高温、抗热震性好、比表面积大，适用于蓄热式空气预热器，可有效提高预热器的换热效率、极大的延长预热器的使用寿命。
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。
Claims (6)
1.一种蜂窝陶瓷蓄热体，其特征在于，以质量百分含量计，由以下原料制备而成：
刚玉粉末 72%~78%；
碳化硅粉末 17%~23%；及
高岭土粉末 2%~8%。
2.根据权利要求1所述的蜂窝陶瓷蓄热体，其特征在于，以质量百分含量计，所述蜂窝陶瓷蓄热体由以下原料制备而成：
刚玉粉末 75%；
碳化硅粉末 20%；及
高岭土粉末 5%。
3.一种蜂窝陶瓷蓄热体的制备方法，其特征在于，包括以下步骤：
获得刚玉粉末、碳化硅粉末和高岭土粉末；
以质量百分含量计，将72%~78%的所述刚玉粉末、17%~23%的所述碳化硅粉末和2%~8%的所述高岭土粉末混合、搅拌均匀后静止均化，得到混合料；
将所述混合料与水混合，搅拌均匀后加入模具，采用振动捣实成型，脱模得到胚体；
将所述胚体风干、烘干、烧结，冷却后得到所述蜂窝陶瓷蓄热体。
4.根据权利要求3所述的蜂窝陶瓷蓄热体的制备方法，其特征在于，所述刚玉粉末的粒径为5μm ~10μm，所述碳化硅粉末的粒径为5μm ~10μm，所述高岭土粉末的粒径为5μm ~10μm。
5.根据权利要求3所述的蜂窝陶瓷蓄热体的制备方法，其特征在于，所述烘干的温度为200℃~260℃。
6.根据权利要求3所述的蜂窝陶瓷蓄热体的制备方法，其特征在于，所述烧结的温度为1480℃~1540℃。
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